Mmfp 1112 Supercharger Install Scew Your Boss 016

KB SC 302-16.6 psi vs. 21 psi Though we ran other boost levels, the final pulley swap (3.50 inches) brought a peak boost reading of 21 psi. It’s amazing that the bone-stock Boss motor (and clutch) was not only capable of withstanding 21 psi of boost, but seemed to thrive on the pressure and pump out an impressive 854 hp and 643 lb-ft of torque—more than doubling the factory power on the way.